harmony 鸿蒙@ohos.file.fileExtensionInfo (User File Extension Information)

2022-12-05
浏览 (527)

@ohos.file.fileExtensionInfo (User File Extension Information)

The fileExtensionInfo module defines attributes in RootInfo and FileInfo of the user file access and management module.

NOTE

The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.

The APIs provided by this module are system APIs.

Modules to Import

import fileExtensionInfo from '@ohos.file.fileExtensionInfo';

fileExtensionInfo.DeviceType

Defines the values of deviceType used in RootInfo.

Model restriction: This API can be used only in the stage model.

System capability: SystemCapability.FileManagement.UserFileService

Name	Value	Description
DEVICE_LOCAL_DISK	1	Local disk.
DEVICE_SHARED_DISK	2	Shared disk.
DEVICE_SHARED_TERMINAL	3	Distributed network device.
DEVICE_NETWORK_NEIGHBORHOODS	4	Network neighbor device.
DEVICE_EXTERNAL_MTP	5	MTP device.
DEVICE_EXTERNAL_USB	6	USB device.
DEVICE_EXTERNAL_CLOUD	7	Cloud disk.

fileExtensionInfo.DeviceFlag

Defines the values of deviceFlags used in RootInfo. deviceFlags is used to determine whether a capability is available through the AND operation.

Model restriction: This API can be used only in the stage model.

System capability: SystemCapability.FileManagement.UserFileService

Attributes

Name	Type	Readable	Writable	Description
SUPPORTS_READ	number	Yes	No	The device supports read.
SUPPORTS_WRITE	number	Yes	No	The device supports write.

fileExtensionInfo.DocumentFlag

Defines the values of mode used in FileInfo.

Model restriction: This API can be used only in the stage model.

System capability: SystemCapability.FileManagement.UserFileService

Attributes

Name	Type	Readable	Writable	Description
REPRESENTS_FILE	number	Yes	No	File.
REPRESENTS_DIR	number	Yes	No	Directory.
SUPPORTS_READ	number	Yes	No	This file is readable.
SUPPORTS_WRITE	number	Yes	No	This file is writable.